Question

a^3+216

Answer 1

This is the sum of 2 cubes

There is a simple formula for this.. unfortunately you have to memorize it.

a^3 + b^2 = (a + b)(a^2 - ab + b^2)

a in your case is a
b in your case is 6 because 6^3 = 216

Try plugging in and then let me know what you get.

Answer 2

how do i get a?

Answer 3

You just use a....
(a + 6)(a^2 - 6a + 36) this is the answer.. Do you understand?

Answer 4

no. :-(